Review by @goranlonnqvist on Sep 2, 2017 worked for me too. Even though downgrading also works, adding "https://" link of evernote to Prefs->Privacy->Exception list is /the/ solution at the moment.


Evernote couldn't update the addon for months; shame on them. But, guys, please dont get upset; full functionality is still on 6.9.3; stick with this working old version until /they/ come with the new one.

In earlier reviews they mentioned the solution:
* Go to about:addons and remove current web clipper
* Go to version page: https://addons.mozilla.org/en-US/firefox/addon/evernote-web-clipper/versions/
* Scroll down to 6.9.3 and click "add to firefox"
* After the installation, use as usual.

Since I have to give a star rating for the review I, personally, rate the "function" not the "not-why-and-how-they-were-late-to-update-the-addon". If any user want to do the later, go to evernote support page and complain over there.

I am sure they will come with lots of functionality as well as solutions to problems with the long waited update to the addon.